Fill up on these nutritional powerhouses to stay healthy in hot weather.

Summertime's Top Foods

Summertime's Top Foods

You know summer's the perfect time to switch to flip-flops, but did you know it's also the right time to change your diet? Being outdoors more often—and sweating—ups your risk for health problems such as dehydration, skin sensitivities and vitamin and mineral deficiencies. The simple (and delicious) solution? "Eat local, in-season fruits. Their nutrients are at their peak in the summer," says Julie Kaye, MPH, RD, CDN, a registered dietitian in New York City. "But they're not the only foods that will help your body look and feel its best during the hottest time of year." Click through to see what else you should definitely eat (and drink!) this season.

Watermelon

Watermelon

As its name implies, this fruit is a hydration hero, and fluids are exactly what you need when the heat is on. "Watermelon's high water content keeps you cool and hydrated," says Boston-based registered dietitian Janel Funk, MS, RD, LDN, who runs the website Eat Well With Janel. That same high water content will also keep you feeling full, which could curb cravings. As an added summer bonus, "Watermelon also contains lycopene, which protects skin cells from sun damage," says Funk.